Question

what is speed of light in vaccum

Answer 1

THE SPEED OF THE LIGHT IN VACUUM IS 300000 kilometre per second...

Answer 2

$\bf{Speed\: of\: Light}$ is

$\boxed{300000 \: {km}\: {s}^{-1}}$
OR
$\boxed{ 3 \times {10}^{8} \: m \: {s}^{-1}}$

• It is the $\textit{fastest\:speed}$ that can be achieved in the universe.

• Speed of light in vaccum is denoted as $\textbf{c.}$
It is a universal constant.

• It requires no medium to travel.